Medium
Miniflux 2: Open Redirect Bypass
Type: advisorySources: OSV
Miniflux 2 is an open source feed reader. Prior to 2.3.1, IsRelativePath in internal/urllib/url.go accepts redirect targets containing backslashes because Go URL parsing treats them as path characters. Browser backslash normalization converts them to forward slashes. An unauthenticated attacker can provide such a redirect_url value to the login flow, bypass the relative-path and host checks, and redirect a victim to an attacker-controlled external site. This issue is fixed in version 2.3.1.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-55185
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 8 Nov 2026, 01:19 UTC · Revision 1
Source evidence
Miniflux 2 is an open source feed reader. Prior to 2.3.1, IsRelativePath in internal/urllib/url.go accepts redirect targets containing backslashes because Go URL parsing treats them as path characters. Browser backslash normalization converts them to forward slashes. An unauthenticated attacker can provide such a redirect_url value to the login flow, bypass the relative-path and host checks, and redirect a victim to an attacker-controlled external site. This issue is fixed in version 2.3.1.
osv:CVE-2026-55185
Complete source record
{
"id": "04a8c395d783f70e754fb8627fcea9ebd57c9e8111fc88910bd3702677b11216",
"url": "https://osv.dev/vulnerability/CVE-2026-55185",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Miniflux 2: Open Redirect Bypass",
"summary": "Miniflux 2 is an open source feed reader. Prior to 2.3.1, IsRelativePath in internal/urllib/url.go accepts redirect targets containing backslashes because Go URL parsing treats them as path characters. Browser backslash normalization converts them to forward slashes. An unauthenticated attacker can provide such a redirect_url value to the login flow, bypass the relative-path and host checks, and redirect a victim to an attacker-controlled external site. This issue is fixed in version 2.3.1.",
"evidence": "osv:CVE-2026-55185",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-55185",
"aliases": [
"CVE-2026-55185",
"GHSA-m999-j542-5w3r",
"GO-2026-5500"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/miniflux/v2",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "9a774083ab4f61f7d604fb950bdd6aff029824a1"
},
{
"fixed": "c896bafdaa19c3f280b02b1059f84706495f1949"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "2.3.1"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "c896bafdaa19c3f280b02b1059f84706495f1949"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "9a774083ab4f61f7d604fb950bdd6aff029824a1"
}
],
"source": "REFERENCES_TAG",
"original_tag": "2.3.1"
}
]
}
}
],
"versions": [
"v2.3.0",
"2.3.0",
"v2.2.19",
"2.2.19",
"v2.2.18",
"2.2.18",
"v2.2.17",
"2.2.17",
"v2.2.16",
"2.2.16",
"v2.2.15",
"2.2.15",
"v2.2.14",
"2.2.14",
"v2.2.13",
"2.2.13",
"v2.2.12",
"2.2.12",
"v2.2.11",
"2.2.11",
"v2.2.10",
"2.2.10",
"2.2.9",
"v2.2.8",
"2.2.8",
"v2.2.7",
"2.2.7",
"2.2.6",
"2.2.5",
"2.2.4",
"v2.2.3",
"2.2.3",
"2.2.2",
"2.2.1",
"v2.2.0",
"2.2.0",
"2.1.4",
"2.1.3",
"v2.1.2",
"2.1.2",
"v2.1.1",
"2.1.1",
"2.1.0",
"v2.0.51",
"2.0.51",
"2.0.50",
"v2.0.49",
"2.0.49",
"2.0.48",
"v2.0.48",
"v2.0.47",
"2.0.47",
"v2.0.46",
"v1.0.46",
"2.0.46",
"2.0.45",
"2.0.44",
"2.0.43",
"2.0.42",
"2.0.41",
"2.0.40",
"2.0.39",
"2.0.38",
"2.0.37",
"2.0.36",
"2.0.35",
"2.0.34",
"2.0.33",
"2.0.32",
"2.0.31",
"2.0.30",
"2.0.29",
"2.0.28",
"2.0.27",
"2.0.26",
"2.0.25",
"2.0.24",
"2.0.23",
"2.0.22",
"2.0.21",
"2.0.20",
"2.0.19",
"2.0.18",
"2.0.17",
"2.0.16",
"2.0.15",
"2.0.14",
"2.0.13",
"2.0.12",
"2.0.11",
"2.0.10",
"2.0.9",
"2.0.8",
"2.0.7",
"2.0.6",
"2.0.5",
"2.0.4",
"2.0.3",
"2.0.2",
"2.0.1",
"2.0.0",
"2.0.0-rc1"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55185.json"
}
}
],
"modified": "2026-10-28T02:30:52.334650390Z",
"provider": "osv",
"references": [
"https://github.com/miniflux/v2/releases/tag/2.3.1",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55185.json",
"https://github.com/miniflux/v2/security/advisories/GHSA-m999-j542-5w3r",
"https://nvd.nist.gov/vuln/detail/CVE-2026-55185",
"https://github.com/miniflux/v2/commit/c896bafdaa19c3f280b02b1059f84706495f1949",
"https://github.com/miniflux/v2/pull/4362"
],
"provider_metadata": {
"cwe_ids": [
"CWE-601"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55185.json"
}
},
"related_cves": [
{
"value": "CVE-2026-55185",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 521281,
"published_at": "2026-08-21T20:19:14.122+00:00"
}